using System;
using System.Windows.Forms;
using CSW.Framework.Common;
using CSW.Framework.UI.Binding;
using DevExpress.XtraEditors;

namespace CSW.Framework.UI.DevEx.Binding
{
    /// <summary>
    /// A wrapper class for binding <see cref="CheckEdit"/> objects.
    /// </summary>
    public class BindableCheckEdit : IBindableControl
    {
        private readonly CheckEdit m_CheckEdit;
        private readonly bool m_AllowTabStop;

        /// <summary>
        /// Initializes a new instance of the <see cref="BindableCheckEdit"/> class.
        /// </summary>
        /// <param name="checkEdit">The <see cref="CheckEdit"/> control to wrap.</param>
        public BindableCheckEdit(CheckEdit checkEdit)
        {
            Guard.ArgumentNotNull(checkEdit, "checkEdit");

            m_CheckEdit = checkEdit;
            m_AllowTabStop = m_CheckEdit.TabStop;
            m_CheckEdit.CheckedChanged += CheckEdit_CheckChanged;
        }

        private void CheckEdit_CheckChanged(object sender, EventArgs e)
        {
            EventHandler tmpValidated = Validated;
            if (tmpValidated != null)
            {
                tmpValidated(sender, e);
            }
        }

        #region IBindableControl Members

        /// <summary>
        /// Occurs when the control has validated.
        /// </summary>
        public event EventHandler Validated;

        /// <summary>
        /// Sends the <see cref="Validated"/> event.
        /// </summary>
        public void SendValidated()
        {
            EventHandler validated = Validated;
            if (validated != null)
                validated(this, EventArgs.Empty);
        }

        /// <summary>
        /// Gets the control this object wraps.
        /// </summary>
        /// <value>The control this object wraps.</value>
        public Control Control
        {
            get { return m_CheckEdit; }
        }

        /// <summary>
        /// Gets or sets the value of the control.
        /// </summary>
        /// <value>The value of the control.</value>
        public object Value
        {
            get { return m_CheckEdit.Checked; }
            set { m_CheckEdit.Checked = (value == null ? false : (bool)value); }
        }

        /// <summary>
        /// Gets the name of the control.
        /// </summary>
        /// <value>The name of the control.</value>
        public string Name
        {
            get { return m_CheckEdit.Name; }
        }

        /// <summary>
        /// Gets or sets a value indicating whether the control is enabled.
        /// </summary>
        /// <value><c>true</c> if enabled; otherwise, <c>false</c>.</value>
        public bool Enabled
        {
            get { return m_CheckEdit.Enabled; }
            set { m_CheckEdit.Enabled = value; }
        }

        /// <summary>
        /// Gets or sets a value indicating whether the control is read only.
        /// </summary>
        /// <value><c>true</c> if read only; otherwise, <c>false</c>.</value>
        public bool ReadOnly
        {
            get { return m_CheckEdit.Properties.ReadOnly; }
            set 
            { 
                m_CheckEdit.Properties.ReadOnly = value;
                m_CheckEdit.Enabled = !value;
                m_CheckEdit.TabStop = !value && m_AllowTabStop;
            }
        }

        /// <summary>
        /// Focuses the control.
        /// </summary>
        public void Focus()
        {
            m_CheckEdit.Focus();
        }

        /// <summary>
        /// Gets the tab index.
        /// </summary>
        /// <value>The tab index.</value>
        public int TabIndex
        {
            get { return m_CheckEdit.TabIndex; }
        }

        /// <summary>
        /// Gets or sets the maximum string length.
        /// </summary>
        /// <value>The maximum string length.</value>
        public int MaxLength
        {
            get { throw new NotSupportedException("MaxLength is not supported."); }
            set { throw new NotSupportedException("MaxLength is not supported."); }
        }

        #endregion

        /// <summary>
        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
        /// </summary>
        public void Dispose()
        {
            Validated = null;
            m_CheckEdit.CheckedChanged -= CheckEdit_CheckChanged;
        }
    }
}